<!DOCTYPE html>
<html>

<head>
  <!-- USE DEVELOPMENT VERSION -->
  <script src="/konva.min.js"></script>
  <meta charset="utf-8" />
  <title>Konva 图形控件</title>
  <style>
    body {
      margin: 0;
      padding: 0;
      overflow: hidden;
      background-color: #f0f0f0;
    }
  </style>
</head>

<body>
  <div id="container"></div>
  <script>
    var width = window.innerWidth
    var height = window.innerHeight

    var stage = new Konva.Stage({
      container: 'container',
      width: width,
      height: height
    })

    var layer = new Konva.Layer()
    stage.add(layer)

    var circle = new Konva.Circle({
      x: 150,
      y: 150,
      radius: 70,
      fill: 'red',
      draggable: true
    })
    layer.add(circle)

    // create new transformer
    var tr = new Konva.Transformer({
      anchorStroke: '#0000ff',
      anchorFill: 'yellow',
      anchorSize: 20,
      borderStroke: '#ff0000',
      borderDash: [5, 5]
    })
    layer.add(tr)
    tr.attachTo(circle)
    layer.draw();
  </script>
</body>

</html>